new Timera;
new Timerb;

public OnGameModeInit()
{
     Timera = SetTimer("Next",270000,false);
     Timerb = SetTimer("Explode",7000,false);
return 1;
}

forward Exploded(playerid);
public Exploded(playerid)
{
    SendClientMessageToAll(COLOR_GREEN, "The bom has been armed, everything is going to explode in 30 seconds!!");
    SendClientMessageToAll(COLOR_YELLOW, "Loading next map wait!");
    KillTimer(Timer2);
    return 1;
}
forward Next(playerid);
public Next(playerid)
{
    SendClientMessageToAll(COLOR_YELLOW, "Loading next map wait!");
    return 1;
}

C:\Users\Adrian\Downloads\server 3\gamemodes\gangwars.pwn(214) : warning 204: symbol is assigned a value that is never used: "Timerb"
C:\Users\Adrian\Downloads\server 3\gamemodes\gangwars.pwn(224) : warning 204: symbol is assigned a value that is never used: "Timera"
Pawn compiler 3.2.3664          Copyright (c) 1997-2006, ITB CompuPhase


2 Warnings.

SetTimer("Next",270000,false);
SetTimer("Explode",7000,false);

KillTimer(Timer2);